DES算法和MAC算法总结

Posted 2020-12-04 alsodzy

需要用到的工具类，代码如下：

import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @ClassName: CommonUtils
 * @Description: 通用工具类
 * @since: 0.0.1
 * @author: dzy
 * @date: 2017年2月22日 上午11:46:44
 */
public class CommonUtils {


    /**
     * @param date    日期
     * @param pattern 模式 如:yyyyMMdd等
     * @return
     * @Title: formatDate
     * @Description: 格式化日期
     * @since: 0.0.1
     */
    public static String formatDate(Date date, String pattern) {
        SimpleDateFormat formatter = new SimpleDateFormat(pattern);
        return formatter.format(date);
    }

    /**
     * @param strDate String类型日期
     * @param pattern 日期显示模式
     * @return
     * @Title: parseDate
     * @Description: 将String日期转换为Date类型日期
     * @since: 0.0.1
     */
    public static Date parseDate(String strDate, String pattern) {
        SimpleDateFormat formatter = null;
        if (StringUtils.isBlank(strDate)) {
            return null;
        }
        formatter = new SimpleDateFormat(pattern);
        try {
            return formatter.parse(strDate);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * @param date   操作前的日期
     * @param field  日期的部分如:年,月,日
     * @param amount 增加或减少的值(负数表示减少)
     * @return
     * @Title: dateAdd
     * @Description: 日期的加减操作
     * @since: 0.0.1
     */
    public static Date dateAdd(Date date, int field, int amount) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(field, amount);
        return calendar.getTime();
    }

    /**
     * @param source 源字符串
     * @param offset 填充开始的位置, 0-在左边, source.getBytes().length 在右边, 如果有中文时需小心位置
     * @param c      用于填充的字符
     * @param length 最后字符串的字节长度
     * @return
     * @Title: fill
     * @Description: 填充字符串, 长度是按字节计算, 不是字符
     * @since: 0.0.1
     */
    public static String fill(String source, int offset, char c, int length) throws UnsupportedEncodingException {
        if (null == source) {
            source = "";
        }
        if (source.getBytes(CustomConstants.CHARSET_UTF8).length == length) {
            return source;
        }
        byte[] buf = new byte[length];
        byte[] src = source.getBytes(CustomConstants.CHARSET_UTF8);
        if (src.length > length) {
            System.arraycopy(src, src.length - length, buf, 0, length);
            return new String(buf, CustomConstants.CHARSET_UTF8);
        }
        if (offset > src.length) {
            offset = src.length;
        } else if (offset < 0) {
            offset = 0;
        }
        int n = length - src.length;

        System.arraycopy(src, 0, buf, 0, offset);
        for (int i = 0; i < n; i++) {
            buf[i + offset] = (byte) c;
        }
        System.arraycopy(src, offset, buf, offset + n, src.length - offset);
        return new String(buf, CustomConstants.CHARSET_UTF8);
    }

    /**
     * @param original 原字符串
     * @param offset   填充开始的位置, 0-在左边, original.getBytes().length 在右边, 如果有中文时需小心位置
     * @param length   替换的字节数
     * @param c        用于替换的字符
     * @return
     * @Title: replace
     * @Description: 替换字符串, 长度是按字节计算, 不是字符
     * @since: 0.0.1
     */
    public static String replace(String original, int offset, int length, char c) throws UnsupportedEncodingException {
        if (original == null) {
            original = "";
        }
        if (original.getBytes(CustomConstants.CHARSET_UTF8).length <= offset) {
            return original;
        }
        if (original.getBytes(CustomConstants.CHARSET_UTF8).length < offset + length) {
            length = original.getBytes(CustomConstants.CHARSET_UTF8).length - offset;
        }
        byte[] buf = new byte[original.length()];
        byte[] src = original.getBytes(CustomConstants.CHARSET_UTF8);
        System.arraycopy(src, 0, buf, 0, offset);

        for (int i = offset; i < offset + length; i++) {
            buf[i] = (byte) c;
        }
        System.arraycopy(src, offset + length, buf, offset + length, src.length - offset - length);
        return new String(buf, CustomConstants.CHARSET_UTF8);
    }

    /**
     * @param s 16进制字符串
     * @return
     * @Title: hexToByte
     * @Description: 16进制字符串转字节数组
     * @since: 0.0.1
     */
    public static byte[] hexToByte(String s) {
        byte[] result = null;
        try {
            int i = s.length();
//            if (i % 2 == 1) {
//                throw new Exception("字符串长度不是偶数.");
//            }
            if (i % 2 != 0) {
                throw new Exception("字符串长度不是偶数.");
            }
            result = new byte[i / 2];
            for (int j = 0; j < result.length; j++) {
                result[j] = (byte) Integer.parseInt(s.substring(j * 2, j * 2 + 2), 16);
            }
        } catch (Exception e) {
            result = null;
            e.printStackTrace();
//            log.error("16进制字符串转字节数组时出现异常:", e);
        }
        return result;
    }

    /**
     * @param bytes 字节数组
     * @return
     * @Title: byte2hexString
     * @Description: 字节数组转换为16进制字符串    //0x33 0xD2 0x00 0x46 转换为 "33d20046" 转换和打印报文用
     * @since: 0.0.1
     */
    public static String byte2hexString(byte[] bytes) {
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) {
            if (((int) bytes[i] & 0xff) < 0x10) {
                buf.append("0");
            }
            buf.append(Long.toString((int) bytes[i] & 0xff, 16));
        }
        return buf.toString().toUpperCase();
    }

    /**
     * @param hexString 16进制字符串    如:"33d20046" 转换为 0x33 0xD2 0x00 0x46
     * @return
     * @Title: hexString2byte
     * @Description: 16进制字符串转字节数组
     * @since: 0.0.1
     */
    public static byte[] hexString2byte(String hexString) {
        if (null == hexString || hexString.length() % 2 != 0 || hexString.contains("null")) {
            return null;
        }
        byte[] bytes = new byte[hexString.length() / 2];
        for (int i = 0; i < hexString.length(); i += 2) {
            bytes[i / 2] = (byte) (Integer.parseInt(hexString.substring(i, i + 2), 16) & 0xff);
        }
        return bytes;
    }

    /**
     * @param i 需要转的int类型数字
     * @return
     * @Title: byte1ToBcd2
     * @Description: int类型转BCD码
     * @since: 0.0.1
     */
    public static String byte1ToBcd2(int i) {
//        return (new Integer(i / 16).toString() + (new Integer(i % 16)).toString());
        return Integer.toString(i / 16) + Integer.toString(i % 16);
    }

    /**
     * @param b 字节数组
     * @return
     * @Title: byteToHex2
     * @Description: 字节数组转换为16进制字符串        For example, byte[] {0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF} will be changed to String "0123456789ABCDEF"
     * @since: 0.0.1
     */
    public static String byteToHex2(byte[] b) {
        StringBuffer result = new StringBuffer();
        String tmp = "";

        for (int i = 0; i < b.length; i++) {
            tmp = Integer.toHexString(b[i] & 0xff);
            if (tmp.length() == 1) {
                result.append("0" + tmp);
            } else {
                result.append(tmp);
            }
        }
        return result.toString().toUpperCase();
    }

    /**
     * @param num 数字
     * @param len 字节数组长度
     * @return
     * @Title: intToHexBytes
     * @Description: int类型转16进制字节数组
     */
    public static byte[] intToHexBytes(int num, int len) {
        byte[] bytes = null;
        String hexString = Integer.toHexString(num);
        if (len > 0) {
            int length = len * 2;
            hexString = CustomStringUtils.leftFill(hexString, ‘0‘, length);
            bytes = CommonUtils.hexString2byte(hexString);
        }
        return bytes;
    }

    /*public static String byteToHex3(byte[] b) {
        String result = "";
        String tmp = "";

        for (int n = 0; n < b.length; n++) {
            tmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (tmp.length() == 1) {
                result = result + "0" + tmp;
            } else {
                result = result + tmp;
            }
            if (n < b.length - 1) {
                result = result + "";
            }
        }
        return result.toUpperCase();
    }*/

    /**
     * @param str 需要转换编码的字符串
     * @return
     * @Title: iso2Gbk
     * @Description: 将ISO-8859-1编码的字符串转成GBK编码的字符串
     * @since: 0.0.1
     */
    public static String iso2Gbk(String str) {
        if (null == str) {
            return str;
        }
        try {
            return new String(str.getBytes("ISO-8859-1"), "GBK");
        } catch (UnsupportedEncodingException e) {
//            log.error("不支持的编码异常:", e);
            e.printStackTrace();
            return str;
        }
    }

//    /**
//     * @param message
//     * @return
//     * @Title: getSubElement
//     * @Description: 分解各子域到HashMap
//     * @since: 0.0.1
//     */
//    public static Map<String, String> getSubElement(byte[] message) {
//        Map<String, String> map = new HashMap<String, String>();
//        String key = null;
//        String value = null;
//        int len = 0;
//        int idx = 0;
//        while (idx < message.length) {
//            key = new String(message, idx, 2);
//            idx += 2;    //取了SE id 移2位
//            len = Integer.parseInt(new String(message, idx, 2));
//            idx += 2;    //取了SE id的内容长度  移2位
//            value = new String(message, idx, len);
//            map.put(key, value);
//            idx += len;
//        }
//        return map;
//    }

    //byte数组转成long

    /**
     * @param b 将字节数组转long类型 位置为小端
     * @return
     */
    public static long byteToLong(byte[] b) {
        long s = 0;
        long s0 = b[0] & 0xff;// 最低位
        long s1 = b[1] & 0xff;
        long s2 = b[2] & 0xff;
        long s3 = b[3] & 0xff;
        long s4 = b[4] & 0xff;// 最低位
        long s5 = b[5] & 0xff;
        long s6 = b[6] & 0xff;
        long s7 = b[7] & 0xff;

        // s0不变
        s1 <<= 8;
        s2 <<= 16;
        s3 <<= 24;
        s4 <<= 8 * 4;
        s5 <<= 8 * 5;
        s6 <<= 8 * 6;
        s7 <<= 8 * 7;
        s = s0 | s1 | s2 | s3 | s4 | s5 | s6 | s7;
        return s;
    }

    /**
     * @param b 将字节数组转int类型     位置为小端
     * @return
     */
    public static int byteToInt(byte[] b) {
        int s = 0;
        int s0 = b[0] & 0xff;// 最低位
        int s1 = b[1] & 0xff;
        int s2 = b[2] & 0xff;
        int s3 = b[3] & 0xff;

        // s0不变
        s1 <<= 8;
        s2 <<= 16;
        s3 <<= 24;

        s = s0 | s1 | s2 | s3;
        return s;
    }

    /**
     * int类型转换小端的byte数组
     * @param i
     * @return
     */
    public static byte[] intToLittleBytes(int i) {
        ByteBuffer byteBuffer = ByteBuffer.allocate(4);
        byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
        byteBuffer.asIntBuffer().put(i);
        byte[] littleBytes = byteBuffer.array();
        return littleBytes;
    }

    /**
     * 将一个字节转成10进制
     * @param b
     * @return
     */
    public static int byteToInt(byte b) {
        int value = b & 0xff;
        return value;
    }

    /**
     *  字节数组合并
     * @param bt1   字节数组bt1
     * @param bt2   字节数组bt2
     * @return
     */
    public static byte[] byteMerger(byte[] bt1, byte[] bt2){
        byte[] bt3 = new byte[bt1.length+bt2.length];
        System.arraycopy(bt1, 0, bt3, 0, bt1.length);
        System.arraycopy(bt2, 0, bt3, bt1.length, bt2.length);
        return bt3;
    }

}

 

DES算法总结，代码如下：

import java.security.GeneralSecurityException;  
import java.security.SecureRandom;  
  
import javax.crypto.Cipher;  
import javax.crypto.KeyGenerator;  
import javax.crypto.SecretKey;  
import javax.crypto.SecretKeyFactory;  
import javax.crypto.spec.DESKeySpec;  
import javax.crypto.spec.IvParameterSpec;  
import javax.crypto.spec.SecretKeySpec;  
  
public final class DesUtils {  
      
    private static final byte[] ZERO_IVC = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 };
      
    /** 
     * 生成秘钥 
     * @return 16字节3des秘钥 
     * @throws GeneralSecurityException 
     */  
    public static byte[] create3DESKey() throws GeneralSecurityException {   
        KeyGenerator kg = KeyGenerator.getInstance("DESede");  
        kg.init(112);//must be equal to 112 or 168  
        byte[] key24 =  kg.generateKey().getEncoded();  
        byte[] result = new byte[16];  
        System.arraycopy(key24, 0, result, 0, 16);  
        return result;  
    }  
  
    /** 
     * 3DES加密cbc模式 
     * @param content 待加密数据 
     * @param key 秘钥 
     * @param ivb 向量 
     * @return 加密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptBy3DesCbc(byte[] content, byte[] key, byte[] ivb) throws GeneralSecurityException {   
        byte[] _3deskey = new byte[24];  
        System.arraycopy(key, 0, _3deskey, 0, 16);  
        System.arraycopy(key, 0, _3deskey, 16, 8);  
          
        Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding");    
        SecretKey secureKey = new SecretKeySpec(_3deskey, "DESede");    
        IvParameterSpec iv = new IvParameterSpec(ivb);  
        cipher.init(Cipher.ENCRYPT_MODE, secureKey, iv);    
        return cipher.doFinal(content);    
    }  
    /** 
     * 3DES解密cbc模式 
     * @param content 待解密数据 
     * @param key 秘钥 
     * @param ivb 向量 
     * @return 解密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] decryptBy3DesCbc(byte[] content, byte[] key, byte[] ivb) throws GeneralSecurityException {   
        byte[] _3deskey = new byte[24];  
        System.arraycopy(key, 0, _3deskey, 0, 16);  
        System.arraycopy(key, 0, _3deskey, 16, 8);  
          
        Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding");    
        SecretKey secureKey = new SecretKeySpec(_3deskey, "DESede");    
        IvParameterSpec iv = new IvParameterSpec(ivb);  
        cipher.init(Cipher.DECRYPT_MODE, secureKey, iv); 
        long start = System.currentTimeMillis();
        System.out.println(start);
        return cipher.doFinal(content);    
    }  
    /** 
     * 3DES加密cbc模式，默认向量 
     * @param content 待加密数据 
     * @param key 秘钥 
     * @return 加密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptBy3DesCbc(byte[] content, byte[] key) throws GeneralSecurityException {   
        return encryptBy3DesCbc(content, key, ZERO_IVC);  
    }  
      
    /** 
     * 3DES解密cbc模式，默认向量 
     * @param content 带解密数据 
     * @param key 秘钥 
     * @return 解密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] decryptBy3DesCbc(byte[] content, byte[] key) throws GeneralSecurityException {  
        return decryptBy3DesCbc(content, key, ZERO_IVC);  
    }  
  
    /** 
     * 3DES加密Ecb模式 
     * @param content 待加密数据 
     * @param key 加密秘钥 
     * @return 加密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptBy3DesEcb(byte[] content, byte[] key) throws GeneralSecurityException {  
        byte[] _3deskey = new byte[24];  
        System.arraycopy(key, 0, _3deskey, 0, 16);  
        System.arraycopy(key, 0, _3deskey, 16, 8);
          
        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");    
        SecretKey secureKey = new SecretKeySpec(_3deskey, "DESede");    
        cipher.init(Cipher.ENCRYPT_MODE, secureKey);    
        return cipher.doFinal(content);    
    }



    /** 
     * 3DES解密Ecb模式 
     * @param content 待解密数据 
     * @param key 秘钥 
     * @return 解密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] decryptBy3DesEcb(byte[] content, byte[] key) throws GeneralSecurityException {  
        byte[] _3deskey = new byte[24];  
        System.arraycopy(key, 0, _3deskey, 0, 16);  
        System.arraycopy(key, 0, _3deskey, 16, 8);  
          
        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");    
        SecretKey secureKey = new SecretKeySpec(_3deskey, "DESede");    
        cipher.init(Cipher.DECRYPT_MODE, secureKey);    
        return cipher.doFinal(content);    
    }

    /**
     * 3DES加密Ecb模式(3倍密钥长)
     * @param content 待加密数据
     * @param key 加密秘钥
     * @return 加密结果
     * @throws GeneralSecurityException
     */
    public static byte[] encryptBy3DesEcbThreeThreeTimes(byte[] content, byte[] key) throws GeneralSecurityException {
        if (key.length != 24) {
            throw new RuntimeException("密钥长度不是24.");
        }

        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
        SecretKey secureKey = new SecretKeySpec(key, "DESede");
        cipher.init(Cipher.ENCRYPT_MODE, secureKey);
        return cipher.doFinal(content);
    }

    /**
     * 3DES解密Ecb模式((3倍密钥长))
     * @param content 待解密数据
     * @param key 秘钥
     * @return 解密结果
     * @throws GeneralSecurityException
     */
    public static byte[] decryptBy3DesEcbThreeThreeTimes(byte[] content, byte[] key) throws GeneralSecurityException {
        if (key.length != 24) {
            throw new RuntimeException("密钥长度不是24.");
        }

        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
        SecretKey secureKey = new SecretKeySpec(key, "DESede");
        cipher.init(Cipher.DECRYPT_MODE, secureKey);
        return cipher.doFinal(content);
    }

    /** 
     * des的cbc模式加密算法 
     * @param content 待加密数据 
     * @param key 密钥 
     * @return 加密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptByDesCbc(byte[] content, byte[] key) throws GeneralSecurityException {  
        return encryptByDesCbc(content, key, ZERO_IVC);  
    }  
    /** 
     * des的cbc模式解密算法 
     * @param content 待解密数据 
     * @param key 密钥 
     * @return 解密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] decryptByDesCbc(byte[] content, byte[] key) throws GeneralSecurityException {  
        return decryptByDesCbc(content, key, ZERO_IVC);  
    }  
  
    /** 
     * des的cbc模式加密算法 
     * @param content 待加密数据 
     * @param key 加密密钥 
     * @return 加密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptByDesCbc(byte[] content, byte[] key, byte[] icv) throws GeneralSecurityException {  
        SecureRandom sr = new SecureRandom();  
        DESKeySpec dks = new DESKeySpec(key);  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
        SecretKey secretKey = keyFactory.generateSecret(dks);  
        Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");  
        IvParameterSpec iv = new IvParameterSpec(icv);  
          
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv, sr);  
          
        return cipher.doFinal(content);  
    }  
      
    /** 
     * des的cbc模式解密算法 
     * @param content 待解密数据 
     * @param key 密钥 
     * @return 解密结果 
     * @throws GeneralSecurityException 
     */  
    public static byte[] decryptByDesCbc(byte[] content, byte[] key, byte[] icv) throws GeneralSecurityException {  
        SecureRandom sr = new SecureRandom();  
        DESKeySpec dks = new DESKeySpec(key);  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
        SecretKey secretKey = keyFactory.generateSecret(dks);  
        Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");  
        IvParameterSpec iv = new IvParameterSpec(icv);  
          
        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv, sr);  
          
        return cipher.doFinal(content);  
    }  
      
    /** 
     * des加密算法，ECB方式，NoPadding模式，数据字节必须是8的整数倍 
     * @param content   数据字节必须是8的整数倍
     * @param key       密钥
     * @return          加密结果
     * @throws GeneralSecurityException 
     */  
    public static byte[] encryptByDesEcb(byte[] content, byte[] key) throws GeneralSecurityException {   
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");    
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
        SecretKey secretKey = keyFactory.generateSecret(new DESKeySpec(key));  
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);    
        return cipher.doFinal(content);    
    }  
      
    /** 
     * des解密算法，ECB方式，NoPadding模式，数据字节必须是8的整数倍 
     * @param content   数据字节必须是8的整数倍
     * @param key       密钥
     * @throws GeneralSecurityException  
     * @return 
     */  
    public static byte[] decryptByDesEcb(byte[] content, byte[] key) throws GeneralSecurityException {   
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
        SecretKey secretKey = keyFactory.generateSecret(new DESKeySpec(key));  
        cipher.init(Cipher.DECRYPT_MODE, secretKey);    
        return cipher.doFinal(content);    
    }  
      
    /** 
     * 本项目用于生成外部设备认证码和校验卡认证码（javacard GP规范 SCP02安全通道）（cardCryptogram） 
     * B.1.2.1  Full Triple DES MAC  
     * The full triple DES MAC is as defined in [ISO 9797-1] as MAC Algorithm 1 with output transformation 3,  
     * without truncation, and with triple DES taking the place of the block cipher.  
     * @param content 待加密数据 
     * @param key 加密密钥 
     * @return 加密结果后8字节 
     * @throws Exception 
     */  
    public static byte[] encryptBy3DesCbcLast8Mac(byte[] content, byte[] key) throws GeneralSecurityException {   
        byte[] edata = encryptBy3DesCbc(content, key);  
          
        byte[] result = new byte[8];  
        System.arraycopy(edata, edata.length - 8, result, 0, 8);  
        return result;  
    }  
    /** 
     * 将b1和b2做异或，然后返回 
     * @param b1 
     * @param b2 
     * @return 异或结果 
     */  
    public static byte[] xOr(byte[] b1, byte[] b2) {  
        byte[] tXor = new byte[Math.min(b1.length, b2.length)];  
        for (int i = 0; i < tXor.length; i++)  
            tXor[i] = (byte) (b1[i] ^ b2[i]); // 异或(Xor)  
        return tXor;  
    }  
      
    /** 
     * 整形转字节 
     * @param n 整形数值 
     * @param buf 结果字节数组 
     * @param offset 填充开始位置 
     */  
    public static void int2byte(int n, byte buf[], int offset){  
        buf[offset] = (byte)(n >> 24);  
        buf[offset + 1] = (byte)(n >> 16);  
        buf[offset + 2] = (byte)(n >> 8);  
        buf[offset + 3] = (byte)n;  
    }  
      
    /** 
     * 长整形转字节 
     * @param n 长整形数值  
     * @param buf 结果字节数组 
     * @param offset 填充开始位置 
     */  
    public static void long2byte(long n, byte buf[], int offset){  
        buf[offset] = (byte)(int)(n >> 56);  
        buf[offset + 1] = (byte)(int)(n >> 48);  
        buf[offset + 2] = (byte)(int)(n >> 40);  
        buf[offset + 3] = (byte)(int)(n >> 32);  
        buf[offset + 4] = (byte)(int)(n >> 24);  
        buf[offset + 5] = (byte)(int)(n >> 16);  
        buf[offset + 6] = (byte)(int)(n >> 8);  
        buf[offset + 7] = (byte)(int)n;  
    }  
    /**
     * @Title: hexString2byte
     * @Description: 16进制字符串转字节数组
     * @since: 0.0.1
     * @param hexString    16进制字符串    如:"33d20046" 转换为 0x33 0xD2 0x00 0x46
     * @return
     */
    public static byte[] hexString2byte(String hexString) {
        if (null == hexString || hexString.length() % 2  != 0) {
            return null;
        }
        byte[] bytes = new byte[hexString.length() / 2];
        for (int i = 0; i < hexString.length(); i+=2) {
            bytes[i / 2] = (byte) (Integer.parseInt(hexString.substring(i, i + 2), 16) & 0xff);
        }
        return bytes;
    }

    /**
     * @Title: byte2hexString
     * @Description: 字节数组转换为16进制字符串    //0x33 0xD2 0x00 0x46 转换为 "33d20046" 转换和打印报文用
     * @since: 0.0.1
     * @param bytes        字节数组
     * @return
     */
    public static String byte2hexString(byte[] bytes) {
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) {
            if (((int)bytes[i] & 0xff) < 0x10) {
                buf.append("0");
            }
            buf.append(Long.toString((int) bytes[i] & 0xff, 16));
        }
        return buf.toString().toUpperCase();
    }

    /**
     * 3DES加密Ecb模式
     * @param data 待加密数据
     * @param key 加密秘钥
     * @return 加密结果
     * @throws GeneralSecurityException
     */
    public static String encryptBy3DesEcb(String data, String key) {
        byte[] content = hexString2byte(data);
        byte[] deskey = hexString2byte(key);
        String hex2S = "";
        try {
            byte[] doFinal = encryptBy3DesEcb(content, deskey);
            hex2S = byte2hexString(doFinal);
        } catch (GeneralSecurityException e) {
            e.printStackTrace();
        }
        return hex2S;
    }

    /**
     * 分散算法
     * @param data    数据(卡号)
     * @param key       根密钥
     * @return
     */
    public static String getHashProtectKey(String data, String key) {
        String tempKey, protect_key;
        tempKey =byte2hexString(xOr(hexString2byte(data),hexString2byte("FFFFFFFFFFFFFFFF")));
        protect_key = encryptBy3DesEcb(data, key);
        protect_key = protect_key + encryptBy3DesEcb(tempKey, key);
        return protect_key;
    }

    /**
     * 分散密钥
     * @param data  数据(卡号)
     * @param key   根密钥
     * @return
     * @throws GeneralSecurityException
     */
    public static String getHashProtectKey(byte[] data, byte[] key) throws GeneralSecurityException {
        byte[] tempKeyBytes = xOr(data, hexString2byte("FFFFFFFFFFFFFFFF"));
        byte[] key1 = encryptBy3DesEcb(data, key);
        byte[] key2 = encryptBy3DesEcb(tempKeyBytes, key);
        byte[] disperKeyBytes = CommonUtils.byteMerger(key1, key2);
        String disperKey = CommonUtils.byte2hexString(disperKeyBytes);
        return disperKey;
    }

}  

 

MAC算法总结，代码如下：

import java.security.GeneralSecurityException;

/**
 * 计算MAC的工具类
 */
public class MacUtils {

    private static final byte[] ZERO_IVC = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 };

    /**
     * PBOC-3DES-MAC算法
     *
     * 计算MAC(hex) PBOC_3DES_MAC(符合ISO9797Alg3Mac标准) (16的整数补8000000000000000)
     * 前n-1组使用单长密钥DES 使用密钥是密钥的左8字节） 最后1组使用双长密钥3DES （使用全部16字节密钥）
     *
     * 算法步骤：初始数据为D，初始向量为I，3DES秘钥为K0，秘钥低8字节DES秘钥K1；
     * 1、数据D分组并且填充：将字节数组D进行分组，每组8个字节，分组编号从0开始,分别为D0...Dn；最后一个分组不满8字节的，先填充一个字节80，
     * 后续全部填充00，满8字节的，新增一个8字节分组（80000000 00000000）；
     * 2、进行des循环加密：（1）D0和初始向量I进行按位异或得到结果O0;(2)使用秘钥K1，DES加密结果O0得到结果I1,
     * 将I1和D1按位异或得到结果D1；(3)循环第二步骤得到结果Dn； 3、将Dn使用16字节秘钥K0进行3DES加密，得到的结果就是我们要的MAC。
     * @param data
     * @param key
     * @param icv
     * @return
     * @throws Exception
     */
    public static byte[] calculatePboc3desMAC(byte[] data, byte[] key, byte[] icv) throws Exception {

        if (key == null || data == null)
            throw new RuntimeException("data or key is null.");
        if (key.length != 16)
            throw new RuntimeException("key length is not 16 byte.");

        byte[] leftKey = new byte[8];
        System.arraycopy(key, 0, leftKey, 0, 8);

        // 拆分数据（8字节块/Block）
        final int dataLength = data.length;
        final int blockCount = dataLength / 8 + 1;
        final int lastBlockLength = dataLength % 8;

        byte[][] dataBlock = new byte[blockCount][8];
        for (int i = 0; i < blockCount; i++) {
            int copyLength = i == blockCount - 1 ? lastBlockLength : 8;
            System.arraycopy(data, i * 8, dataBlock[i], 0, copyLength);
        }
        dataBlock[blockCount - 1][lastBlockLength] = (byte) 0x80;

        byte[] desXor = DesUtils.xOr(dataBlock[0], icv);
        for (int i = 1; i < blockCount; i++) {
            byte[] des = DesUtils.encryptByDesCbc(desXor, leftKey);
            desXor = DesUtils.xOr(dataBlock[i], des);
        }
        desXor = DesUtils.encryptBy3DesCbc(desXor, key);
        return desXor;
    }

    /**
     * PBOC-DES-MAC算法
     * @param data
     * @param key
     * @param icv
     * @return
     * @throws Exception
     */
    public static byte[] calculatePbocdesMAC(byte[] data, byte[] key, byte[] icv) throws Exception {

        if (key == null || data == null)
            throw new RuntimeException("data or key is null.");
        if (key.length != 8)
            throw new RuntimeException("key length is not 16 byte.");

        // 拆分数据（8字节块/Block）
        final int dataLength = data.length;
        final int blockCount = dataLength / 8 + 1;
        final int lastBlockLength = dataLength % 8;

        byte[][] dataBlock = new byte[blockCount][8];
        for (int i = 0; i < blockCount; i++) {
            int copyLength = i == blockCount - 1 ? lastBlockLength : 8;
            System.arraycopy(data, i * 8, dataBlock[i], 0, copyLength);
        }
        dataBlock[blockCount - 1][lastBlockLength] = (byte) 0x80;

        byte[] desXor = DesUtils.xOr(dataBlock[0], icv);
        for (int i = 1; i < blockCount; i++) {
            byte[] des = DesUtils.encryptByDesCbc(desXor, key);
            desXor = DesUtils.xOr(dataBlock[i], des);
        }
        desXor = DesUtils.encryptByDesCbc(desXor, key);
        return desXor;
    }

    /**
     * ANSI X9.9MAC算法  <br/>
     * (1) ANSI X9.9MAC算法只使用单倍长密钥。  <br/>
     * (2)  MAC数据先按8字节分组，表示为D0～Dn，如果Dn不足8字节时，尾部以字节00补齐。 <br/>
     * (3) 用MAC密钥加密D0，加密结果与D1异或作为下一次的输入。 <br/>
     * (4) 将上一步的加密结果与下一分组异或，然后再用MAC密钥加密。<br/>
     * (5) 直至所有分组结束，取最后结果的左半部作为MAC。<br/>
     * 采用x9.9算法计算MAC (Count MAC by ANSI-x9.9).
     *
     * @param key  8字节密钥数据
     * @param data 待计算的缓冲区
     * @throws GeneralSecurityException
     */
    public static byte[] calculateANSIX9_9MAC(byte[] key, byte[] data) throws GeneralSecurityException {

        final int dataLength = data.length;
        final int lastLength = dataLength % 8;
        final int lastBlockLength = lastLength == 0 ? 8 : lastLength;
        final int blockCount = dataLength / 8 + (lastLength > 0 ? 1 : 0);

        // 拆分数据（8字节块/Block）
        byte[][] dataBlock = new byte[blockCount][8];
        for (int i = 0; i < blockCount; i++) {
            int copyLength = i == blockCount - 1 ? lastBlockLength : 8;
            System.arraycopy(data, i * 8, dataBlock[i], 0, copyLength);
        }

        byte[] desXor = new byte[8];
        for (int i = 0; i < blockCount; i++) {
            byte[] tXor = DesUtils.xOr(desXor, dataBlock[i]);
            desXor = DesUtils.encryptByDesEcb(tXor, key); // DES加密
        }
        return desXor;
    }

    /**
     * 采用ANSI x9.19算法计算MAC (Count MAC by ANSI-x9.19).<br/>
     * 将ANSI X9.9的结果做如下计算<br/>
     * (6) 用MAC密钥右半部解密(5)的结果。 <br/>
     * (7) 用MAC密钥左半部加密(6)的结果。<br/>
     * (8) 取(7)的结果的左半部作为MAC。<br/>
     * @param key  16字节密钥数据
     * @param data 待计算的缓冲区
     * @throws GeneralSecurityException
     */
    public static byte[] calculateANSIX9_19MAC(byte[] key, byte[] data) throws GeneralSecurityException {
        if (key == null || data == null)
            return null;

        if (key.length != 16) {
            throw new RuntimeException("秘钥长度错误.");
        }

        byte[] keyLeft = new byte[8];
        byte[] keyRight = new byte[8];
        System.arraycopy(key, 0, keyLeft, 0, 8);
        System.arraycopy(key, 8, keyRight, 0, 8);

        byte[] result99 = calculateANSIX9_9MAC(keyLeft, data);

        byte[] resultTemp = DesUtils.decryptByDesEcb(result99, keyRight);
        return DesUtils.encryptByDesEcb(resultTemp, keyLeft);
    }

}